Re: erl_call -q

Hello,

I don't believe that erl_call supports the "inet_tls" distribution
protocol - https://www.erlang.org/doc/man/erl_call.html

At least, it's not documented in the manual page.

If I try to connect to a TLS dist node using remsh, but without
specifying certs, I get a function_clause error in
public_key,pkix_decode_cert due to the lack of certificates.

My guess is that, provided that you configure certificates for TLS
distribution, you could accomplish what you want by starting a second
node, connecting the "usual way" via addressing the other node, and
then use the rpc module to stop the node.

Thanks,
Luke

On Fri, Mar 25, 2022 at 2:13 AM Bogdan Andu <[email protected]> wrote
>
> Hello,
>
> I want to stop a node started with switch -proto_dist inet_tls :
> $ /usr/lib/erlang/lib/erl_interface-5.2.1/bin/erl_call -q -c proxy -name 'node-name@host-name'
>
> doesn't kill the node:
> $ erl -name node-name@host-name -setcookie proxy -proto_dist inet_tls
> Erlang/OTP 24 [erts-12.3] [source] [64-bit] [smp:4:4] [ds:4:4:10] [async-threads:1]
>
> Eshell V12.3  (abort with ^G)
> (node-name@host-name)1> =NOTICE REPORT==== 25-Mar-2022::08:55:56.447550 ===
> TLS server: In state hello at tls_record.erl:564 generated SERVER ALERT: Fatal - Unexpected Message
>  - {unsupported_record_type,0}
>
> (node-name@host-name)1>
>
> Because the ssl handshake fails the node does not 'catch' the
> command to terminate itself.
>
>
> The execution of command shows the error:
> $ /usr/lib/erlang/lib/erl_interface-5.2.1/bin/erl_call -c proxy -name node-name@host-name -a "init stop"
> erl_call: failed to connect to node node-name@host-name
>
> Actually the erl_call node connects to 'node-name@host-name'  but is rejected with the same error as above.
>
> Because the erl_call cannot connect to a tls erlang node, erl_call cannot stop suc node.
>
> If the node is started like this:
> $ erl -name node-name@host-name -setcookie proxy -proto_dist inet_tcp
>
> erl_call is able to stop it.
>
> Is there a solution to this problem?
>
> Cheers,
>
> Bogdan
>